wulfenite (w. kaolinite and kegelite)

Amber-coloured wulfenite crystals (to 15 mm) in a shallow vug in corroded sulphide, accompanied by a soft, pearlescent, silky-white intergrowth of kegelite and kaolinite (both XRD indicated).

The specimen is almost certainly from the second oxidation zone and was formerly in the collection of Karlheinz Grosch.

kaolinite; kegelite